The way I look at it... The Bills are 4-0 right now and every team they play has a worse record than they do. So yes, you can say they are playing weaker opponents.
I was at the game and i saw him walking off the field with about 2 minutes to go in the first half under his own power. He had a limp similar to Tom Brady.. doesnt look good but we can hope for the best.. at least the corner position is very deep on this team.